Hancock had been a member of many far-right groups over the years. He became a member of the Racial Preservation Society in the 1960’s, which then merged into the National Front in 1967. In the late 1970’s he joined the ‘National Party’, which was one of the many National Front splinter groups.

Throughout the 1970’s, his printing firm produced literature for the National Front, National Party, The League of St George, the British Movement, and after they were formed in the early 80’s, the BNP.

‘Did Six Million Really Die’ was sold in its thousands and was a massive money spinner throughout the world. He was sued in 1982, by author and former deputy chairman on the National Front, Richard Verrall, for unpaid royalties.